98 STUDIES IN NORTH AMERICAN MEMBRACIDjE 



Genus Ophiderma Fairmaire. 



This genus may be distinguished by its depressed, trans 

 versely rounded form, straight dorsum, and in the case of some 

 of the species by its very hairy surface. After a careful study 

 of a long series of specimens I am convinced that the O. salam- 

 andra of Fairmaire is the male of our larger and duller species 

 and Gargara pubescens of Emmons the male of our smaller and 

 more clearly marked species. Ophiderma flaviguttula Godg. I 

 have been unable to recognize although the description answers 

 fairly well to some females of pubescens Emmons. The six 

 species known to me may be distinguished as follows: 



Dorsal line straight or a little depressed; terminal areole of the 

 elytra triangular at base, 1. 



Dorsal line somewhat elevated posteriorly, but not at all com- 

 pressed, behind with a slight sinus; terminal areole of 

 the elytra transverse scarcely bent on its basal line, 



6, nigrocinctus V. D. 



1. Color a uniform yellow, or clear green fading to yellow, 2. 

 -. Color brown, more or less distinctly marked with lighter, 



3- 



2. Pronotum short scarcely surpassing the abdomen; four dots 



on the face and crescent over the eye black ; inhabits 

 Arizona, 5, pallida V. D. 



-. Pronotum attaining the apex of the elytra; face immac 

 ulate; inhabits the eastern United States, 



4, flava Godg. 



3. Dark chestnut brown becoming more or less flavous in 



faded or immature examples; a broad yellow marginal 

 vitta on either side before the middle, which in the male 

 becomes submarginal with a transverse subapical vitta, 



3, flavicephala Godg. 

 -. Greyish or olive brown varying to castaneous or black in 

 the male, more or less strongly marked with pale, 4 



4. Larger, 7-8 mm. ; dull brown, densely hairy, and obscurely 



marked; in the male inclined to castaneous with the 

 markings more pronounced; margins of cheeks strongly 

 sinuated, 1, salamandra Fairm. 



